Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e565c3805c9d34b…

MALICIOUS

PDF

76.9 KB Created: 2021-02-28 17:46:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5521bcfe5d0d721f61fc2dbcf5697dc6 SHA-1: 9a1cb21e07ea2291769a875d1f1ba13ac5d1ae7c SHA-256: 7e565c3805c9d34b9bc46e6c96ef23b39b5c18e7a131ce151136e5965a9c2e09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, pointing to other PDF documents. The primary URL, 'https://soxebez.ru/wix?keyword=fermentation+lab+report', suggests a lure related to a lab report. ClamAV and ML classifiers flagged this as a phishing trojan, indicating a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/wix?keyword=fermentation+lab+report PDF link annotation
    • https://rawabupabazokiz.weebly.com/uploads/1/3/2/6/132695668/43c11cd43eecc.pdfIn PDF document text
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/susukegunusexeg.pdfIn PDF document text
    • http://activa-fb.com/jivevikuxawasodiferojaxtgvbg.pdfIn PDF document text
    • https://sawuwirepugasup.weebly.com/uploads/1/3/0/9/130969548/bukobofudenurolu.pdfIn PDF document text
    • https://paxituzupinemof.weebly.com/uploads/1/3/5/3/135303349/kovur-tuzavuvup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393503/normal_60028d4bae1fd.pdfIn PDF document text
    • http://helpverifedbadges.com/79434121856dq1t9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365656/normal_5fe3f24154f2d.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/UvhjTjd/69072033855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369769/normal_5fcf57e755fbb.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/hgjbIih/fawedemerigib.pdfIn PDF document text
    • https://litemavokof.weebly.com/uploads/1/3/1/8/131871991/480ab3d970d2285.pdfIn PDF document text
    • http://getallcreditscores.info/my_white_rodgers_thermostat_is_blankv4267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454054/normal_5fcf0704845fe.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/gxi9ZSC/43848283992.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/72204164058.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rawigukegopafot.onlinewebshop.net/duvuvenatu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE596 4672 bytes
SHA-256: 2345d5a42efa2a81c7d3348cc05bbeb297e3880dc9b3859710a7b44b20954508
font_01_sfnt_off0000f543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF543 10364 bytes
SHA-256: 937836e5b83a3e7e34eca348b4aad8461e1f2e8c0aab3ed883b73072e9a19103
font_02_sfnt_off000118d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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